I just purchased a 05 black M50 from a buddy of mine last week. The bike only has 1450 miles and seems to be in good shape. I have noticed several times when downshifting to stop at an intersection, the bike sometimes just refuses to go into 1st gear. It wont get past neutral to engage the gear. Usually after some cussing and popping the gear shifter, I can eventually get it to go into 1st.
The guy I got it from put a forward control kit on it. I am wondering if that is part of the problem if its just something funny these bikes do? Most of the times it works fine.